双丝

Rats in experimental group were placed on the expansion appliance, inserting into the diastema between the first and second molars, then stick to molar lingual using light-cured resin for retention.

实验组采用0.014澳丝弯制双眼圈簧样扩弓装置，插入第一、二磨牙牙间隙，用光固化树脂粘结在大鼠磨牙舌侧进行固位；对照组安装未加力的同型扩弓装置。

In the studies on transferring and identifying alien chro-mosomes into wheat,the combined use of mitotic and meioticchromosome N-banding is also successfully practiced in deter-mination of T.durum-H.villosa amphipoid,five wheatalien disomic additions with H.villosa chromosomes,〓〓,alien sulstitution line with chromosome 〓 andsome translocation lines.

在外源染色体导入、鉴定研究中，利用根尖有丝分裂中期染色体和花粉母细胞减数分裂中期Ⅰ染色体的N-分带，快速、准确地鉴定了硬粒小麦一簇毛麦双二倍体、普通小麦一簇毛麦异耐加系V〓、V〓、V〓、V〓和V〓，普通小麦一簇毛麦异代换系V〓以及一些具有易位的杂种后代。

In Polymer, helix is a quite universal configuration Recent experiments show thatsome polymers such as bacterial flagellar filaments can form bistable helices in ionsolutions, which means that left handed helix and right handed helix can coexist in thesame environment The mechanism of this phenomenon has not been explainedsatisfactorily.

在高分子中，螺旋是一种很普遍的高分子组态。近来实验发现，一些高分子，如细菌鞭毛丝，在离子溶液中能够形成双稳态螺旋，即左螺旋与右螺旋在相同的条件下能够同时存在。

As Francisca and I said our farewells at the airport, I caressed her cheek.

法兰西丝卡在机场和我道别的时候，我摸摸她的双颊。

The motor molecule forms bipolar thick filaments that interdigitate with thinner actin filaments in the saromere, forming the basic contractile unit of muscle.

在所有的分子马达中，关于肌球蛋白的研究最多。肌球蛋白是肌肉收缩的关键成份，由它们形成的双极粗丝在肌节内同肌动蛋白细丝交叉对插，构成一个收缩单元。

Pinl is a unique peptidyl-prolyl cis/trans isomerases and can specifically isomerize the phosphorylated Ser/Thr-Pro bonds in certain proteins, thereby modulating their functions.

肤基脯氨酞顺反异构酶Pinl，是由酵母双杂交筛选出的一种功能蛋白，主要调节有丝分裂相关蛋白酶，对细胞周期运行起着非常重要的调节作用赶'〕。

The second step required some of the tall participants to put their knees on the ground in order to keep the balance of the bamboo stick. Although I gave no order for kneeing, some kneed on the ground without hesitation, fully concentrated themselves on the stick, regardless of the wet and muddy ground because of raining, which contributed to our success of the game.

由于我们组员之间高矮差异大，所以难免要求一些同学在我们进行第二个步骤时跪在地上，当时我没要求谁，大家凭着默契，在为了保持平衡的时候，几个组员早已双膝跪在地上了，并且神情专著的望着竹棍，丝毫没有顾及到地上的水。

In this operation the two-way catheter with an inner iron line was led by the guardiance of forefinger post operative urethral.dilation was processed properly,And comparing with control group.Results: 79 cases have been followed up and 69 cases can micturate normally,the cure rate being 87.3%.

回顾分析80例后尿道损伤患者采用食指引导下，直接放置带有导丝的双腔导尿管行简化的尿道会师加牵引术，行术后尿道扩张，并和对照组比较。

These findings convincingly confirmed that the isochromosomes 8q were monocentric chromosomes and that they were truly isochromosomes 8q rather than isodicentric chromosome (8)(p11) or a translocation between a chromosome 8 and any other chromosomes.

由此证实此核型为47，XY，-8，+i(8)(q10)×2，而非等臂双着丝粒8q或8号染色体与其它染色体易位所致。

The fiber length has only little influence on the basic density within the growth rings, and significant correlation at 0.01 levels was found between the basic density and the fiber length among the different rings. Only slight negative correlation was found between the basic density and the fiber width within the growth rings, but significant positive correlation at 0.01 levels was indicated between the basic density and the fiber width among the growth rings, contrary to that of fiber length. It was demonstrated that significant positive correlations at 0.01 levels between the basic density and fiber double wall thickness, fiber length to width ratio and double wall thickness to diameter ratio, significant negative correlations at 0.01 levels between the basic density and fiber diameter and diameter to width ratio, only slight negative correlation between the basic density and fiber width both in the same growth rings and among the different growth rings. No significant correlation was found between the basic density and the vessel morphological features, nor was the tissue proportion in the same growth rings. But among the different rings, it was found there was significant positive correlation at 0.01 levels between the basic density and the fiber proportion among the different rings, and significant negative correlation at 0.01 levels between the basic density and vessel-elements proportion and ray proportion, only slight negative correlation between the basic density and the parenchym proportion. Significant or no significant negative correlation was found between the basic density and the microfibril angle in the same growth rings, but significant negative correlation was found between the basic density and the microfibril angle among the different growth rings.

生长轮内纤维长度对基本密度的影响不大，而在不同生长轮间纤维长度与基本密度达极显著正相关，纤维宽度与此相反，同一生长轮内纤维宽度与基本密度极显著负相关，不同生长轮间只有微弱负相关；基本密度与纤维双壁厚、长宽比、壁腔比在生长轮内和生长轮间均呈极显著正相关，而与胞腔直径、腔径比均呈极显著负相关，仅与纤维宽度呈微弱的负相关；导管形态对基本密度的影响不显著；同一生长轮内组织比量对基本密度的影响也不显著，但不同生长轮间基本密度与纤维比量呈极显著正相关，与导管比量和木射线比量呈极显著负相关，与轴向薄壁细胞比量仅呈不显著负相关；生长轮内基本密度与微纤丝角呈显著或不显著负相关，但在生长轮间这种负相关达到极显著水平。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。